They work, millions use them, but people constantly want to tear them down and claim they have no use. You can just not use them. You almost certainly won't be

They work, millions use them, but people constantly want to tear them down and claim they have no use. You can just not use them. You almost certainly won't be presented with a case in your everyday life in which someone refuses your cash and only accepts Bitcoin. Meanwhile, every day it becomes harder and harder to avoid using Visa or Mastercard as stores go cash free.